Orbitoid
小穴孔虫
🗣️ 情景例句
But I think he was nervous tonight.
但我想他今晚有点紧张。
Whose pen is this?
这是谁的笔？
and we know something of the great variety of the sea bed's topography.
而且我们对海底地形的千变万化也有了一定的了解。